As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MASTER WARNING LIGHT ILLUMINATED WITH AN ASSOCIATED, AUTOPILOT DISCONNECT, RED SEGMENT LIGHT. THERE WAS NO ACTUAL DISCONNECTING OF THE AUTOPILOT & THERE WAS NO AUDIBLE WARNING ASSOCIATED WITH A DISCONNECTING AUTOPILOT. R & R NR 1 AUTOPILOT MONITOR.